Northern Telecom DNC-50 Installation Manual page 134

Table 15-A Continued
Pin Assignments for the Customer Interface Connector (P4)
An open circuit between the + and - pins signifies that there is no alarm present (ALARM
•
INACTIVE). Maximum voltage across the relay is 110 V (relay open).
Caution: These relays are intended for use with dc power only, and cannot be used with ac.
PIN SIGNAL
No. NAME
OUTPUT LINES:
1 +CRA
20 -CRA
2 +MJA
21 -MJA
3 +MNA
22 -MNA
4 +CRV
23 -CRV
5 +MJV
24 -MJV
6 +MNV
25 -MNV
7 +BAY
26 -BAY
8 +AUXREL1
27 -AUXREL1
9 +AUXREL2
28 -AUXREL2
INPUT LINES
10 +USERIN1
29 -USERIN1
11 +USERIN2
30 -USERIN2
12 +USERIN3
31 -USERIN3
FUNCTIONAL
DESCRIPTION
Critical alarm relay contact for audible alarm indicators
Major alarm relay contact for audible alarm indicators
Minor alarm relay contact for audible alarm indicators
Critical alarm relay contact for visual alarm indicators
Major alarm relay contact for visual alarm indicators
Minor alarm relay contact for visual alarm indicators
Relay contact for the bay alarm indicator
Auxiliary contact for relay 1
Auxiliary contact for relay 2
Auxiliary input 1
Auxiliary input 2
Auxiliary input 3 (cabinets only)
Installing the Alarm System 127
Practice 450-1011-201